1980131 has 4 divisors (see below), whose sum is σ = 2004072. Its totient is φ = 1956192.

The previous prime is 1980113. The next prime is 1980169. The reversal of 1980131 is 1310891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1980131 - 2⁶ = 1980067 is a prime.

It is a super-2 number, since 2×1980131² = 7841837554322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1980097 and 1980106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11846 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (501018).

2^1980131 is an apocalyptic number.

1980131 is a deficient number, since it is larger than the sum of its proper divisors (23941).

1980131 is an equidigital number, since it uses as much as digits as its factorization.

1980131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23940.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1980131 is about 1407.1712760002. The cubic root of 1980131 is about 125.5734928240.

The spelling of 1980131 in words is "one million, nine hundred eighty thousand, one hundred thirty-one".